/*
 * If.java
 *
 * Created on August 7, 2007, 5:01 AM
 *
 *  Copyright (C) 2010 Tal Eisenberg
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


package base;

import tal.drivechain.expression.dcExpression;
import tal.drivechain.matchers.VarMatcher;
import tal.drivechain.plugin.Channel;
import tal.drivechain.plugin.Module;

import tal.drivechain.variable.SetProperty;
import tal.drivechain.variable.Variable;

/**
 *
 * @author Main
 */
public class If extends Module {
    private Variable out = null;
    private Variable elseOut = null;
    private VarMatcher trigger = null;
    private dcExpression condition = null;

    @Override
    public void setupProperties() {
        try {
            setTrigger(props.getProperty("trigger"), null);
            setOutput(props.getProperty("output"), null);
            setElse(props.getProperty("else"), null);
            setCondition(props.getProperty("condition"), null);
        } catch (IllegalArgumentException ie) {
            log(ie.getMessage(), MSG.ERROR);
        }
    }

    public void setTrigger(Object value, SetProperty.Flag flag) {
        trigger = (VarMatcher)value;
    } public Object getTrigger() { return trigger; }
    
    public void setOutput(Object value, SetProperty.Flag flag) {
        out = (Variable)value;
    } public Object getOutput() { return out; }
    
    public void setElse(Object value, SetProperty.Flag flag) {
        elseOut = (Variable)value;
    } public Object getElse() { return elseOut; }
    
    public void setCondition(Object value, SetProperty.Flag flag) {
        condition = (dcExpression)value;
    } public Object getCondition() { return condition; }
    
    @Override
    protected void msgReceived(Variable in, long timestamp, Channel channel) {
        try {
            if (trigger.matches(in, channel, this)) {
                if ((Boolean)condition.evaluate(this))
                    sendToOutputs(out, timestamp);  
                else if (elseOut!=null) sendToOutputs(elseOut, timestamp);
            }
        } catch (IllegalArgumentException ie) {
            log(ie.getMessage(), MSG.WARNING);
        }
    }
}
